Facing strong opposition from the Mexican Congress, President Vicente Fox Quesada withdrew the nominations of four corporate executives to the governing board of the state-run oil company PEMEX and replaced them with four government officials. While this was a setback for Fox, the president won a battle to implement daylight-saving time nationwide when Mexico City Mayor Andres Manuel Lopez Obrador dropped his opposition to the time change. In the meantime, Fox must deal with a new congressional commission, formed to investigate allegations of continued safety and environmental violations at the Laguna Verde nuclear power plant in Veracruz state.